<template>
  <div>
    <!-- 导航条区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-alert title="添加商品信息"
                type="info"
                center>
      </el-alert>
      <el-steps :space="200"
                :active="activeIndex-0"
                finish-status="success"
                align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <el-form :model="addForm"
               :rules="addRules"
               ref="addFormRef"
               label-width="100px"
               label-position="top">
        <el-tabs :tab-position="'left'"
                 v-model="activeIndex"
                 :before-leave="beforeLeave"
                 @tab-click="tabclick">
          <el-tab-pane label="基本信息"
                       name='0'>
            <el-form-item label="商品名称"
                          prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格"
                          prop="goods_price">
              <el-input v-model="addForm.goods_price"></el-input>
            </el-form-item>
            <el-form-item label="商品数量"
                          prop="goods_number">
              <el-input v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量"
                          prop="goods_weight">
              <el-input v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品分类"
                          prop="goods_cat">
              <el-cascader v-model="addForm.goods_cat"
                           :options="cateList"
                           :props="cascaderprop"
                           @change="handleChange"></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数"
                       name='1'>
            <el-form-item :label="item.attr_name"
                          v-for="item in manyTablelist"
                          :key="item.attr_id">
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cb"
                             v-for="(cb,i) in item.attr_vals"
                             :key="i"
                             border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性"
                       name='2'>
            <el-form-item v-for="item in onlyTablelist"
                          :key="item.attr_id"
                          :label="item.attr_name">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片"
                       name='3'>
            <el-upload action="http://www.ysqorz.top:8888/api/private/v1/upload"
                       :on-preview="handlePreview"
                       :on-remove="handleRemove"
                       list-type="picture"
                       :headers="headerObj"
                       :on-success="handleSuccess">
              <el-button size="small"
                         type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容"
                       name='4'>
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button type="primary"
                       @click="addConfirm">添加内容</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览对话框 -->
    <el-dialog title="图片预览"
               :visible.sync="imgDialogVisible"
               width="50%">
      <img :src="picPath"
           alt="">
    </el-dialog>
  </div>
</template>
<script>
import _ from 'lodash'
export default {
  data () {
    return {
      activeIndex: '0',
      cateList: [],
      // 动态参数
      manyTablelist: [],
      // 静态属性
      onlyTablelist: [],
      picPath: '',
      imgDialogVisible: false,
      // 添加表单的数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_number: 0,
        goods_weight: 0,
        goods_cat: [],
        pics: [],
        // 商品介绍
        goods_introduce: '',
        attrs: []
      },
      // 为upload设置请求头
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      cascaderprop: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
        expandTrigger: 'hover'
      },
      addRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请输入选择商品分类', trigger: 'blur' }
        ]
      }
    }
  },
  created () {
    this.getCatelist()
  },
  methods: {
    getCatelist: function () {
      const that = this
      this.$http.get('categories', this.cateInfo).then(
        function (res) {
          if (res.data.meta.status !== 200) {
            that.$message.error('获取商品列表失败')
          }
          that.cateList = res.data.data
        })
    },
    // 级联选择器变化
    handleChange: function () {
      // console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    beforeLeave: function (activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请选择商品分类')
        return false
      }
    },
    tabclick: function () {
      if (this.activeIndex === '1') {
        const that = this
        // 获取动态参数
        this.$http.get(`categories/${this.cateId}/attributes`, {
          params: {
            sel: 'many'
          }
        }).then(
          function (res) {
            if (res.data.meta.status !== 200) {
              that.$message.error('获取商品参数失败')
            }
            res.data.data.forEach(item => {
              item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
            })
            that.manyTablelist = res.data.data
          })
      } else if (this.activeIndex === '2') {
        const that = this
        // 获取静态属性
        this.$http.get(`categories/${this.cateId}/attributes`, {
          params: {
            sel: 'only'
          }
        }).then(
          function (res) {
            if (res.data.meta.status !== 200) {
              that.$message.error('获取商品属性失败')
            }
            that.onlyTablelist = res.data.data
          })
      }
    },
    // 图片预览
    handlePreview: function (files) {
      this.picPath = files.response.data.url
      console.log(this.picPath)
      this.imgDialogVisible = true
    },
    // 监听图片删除
    handleRemove: function (files) {
      // console.log(files)
      const filePath = files.response.data.tmp_path
      const i = this.addForm.pics.findIndex(x => x.pic === filePath)
      this.addForm.pics.splice(i, 1)
      console.log(this.addForm)
    },
    // 监听图片上传成功事件
    handleSuccess: function (response) {
      const picInfo = {
        pic: response.data.tmp_path
      }
      this.addForm.pics.push(picInfo)
      // console.log(this.addForm.pics)
    },
    // 表单预验证
    addConfirm: function () {
      this.$refs.addFormRef.validate(valid => {
        if (!valid) {
          return this.$message.error('请填写必要表单项')
        }
      })
      // 预验证成功提交表单
      const form = _.cloneDeep(this.addForm)
      form.goods_cat = form.goods_cat.join(',')
      // 动态参数处理
      this.manyTablelist.forEach(item => {
        const newInfo = {
          attr_id: item.attr_id,
          attr_value: item.attr_vals.join(' ')
        }
        this.addForm.attrs.push(newInfo)
      })
      // 静态属性处理
      this.onlyTablelist.forEach(item => {
        const newInfo = {
          attr_id: item.attr_id,
          attr_value: item.attr_vals
        }
        this.addForm.attrs.push(newInfo)
      })
      form.attrs = this.addForm.attrs
      const that = this
      this.$http.post('/goods', form).then(
        function (res) {
          if (res.data.meta.status !== 201) {
            that.$message.error('添加商品失败')
          }
          that.$message.success('添加商品成功')
          that.$router.push('/goods')
        })
    }
  },
  computed: {
    cateId () {
      if (this.addForm.goods_cat.length !== 3) {
        return null
      }
      return this.addForm.goods_cat[2]
    }
  }
}
</script>
<style lang="less" scoped>
.el-step {
  margin: 15px 0;
}
.el-step-title {
  font-size: 13px;
}
.quill-editor {
  margin-bottom: 15px;
}
</style>
